The benchmark risk-averse equilibrium model does not explain some of the outcomes obtained in experiments with first-price auctions. Nonetheless. the presence of non-linear bidding and the wide dispersion of bids have received little attention in the literature. I focus on these issues and revisit previous laboratory evidence with the help of model-based clustering techniques. https://www.roneverhart.com/Asus-F1400EA-SB34-14-HD-1366x768-Laptop-Intel-Core-i3-1115G4-3-0-GHz-8GB-DDR4-256GB-SSD-Intel-UHD-Graphics-Windows-11-p9785/